Governance
HeadFirst Group is managed by the Board of Directors, consisting of Marion van Happen, Willem Verhaagen, Renger Lammers, and Arco Elsman. They form a full board with the non-executive members.
CEO
Marion van Happen
About Marion van Happen
Marion was appointed CEO of HeadFirst Group in February 2022. She has over twenty years’ experience in HR services, recruitment, and staffing in various commercial and senior management positions in the Netherlands and abroad. Before joining HeadFirst Group, Marion was Chief Operating Officer at RGF Staffing the Netherlands (formerly USG People) and Managing Director of Unique. In the role of CEO, she directs the strategic, operational, and commercial activities of the organisation. Marion has been a member of the Global Management Board of HeadFirst Global since 2024.
People & Culture Joke de Graaf
Executive Office Klaske Kuipers
Corporate Affairs & Public Policy Sem Overduin
Product & Data Mattijs Wassenburg
Engineering Cristian Ciuperca
CFO
Willem Verhaagen
About Willem Verhaagen
Willem joined HeadFirst Group in February 2025 as CFO. From 2012 to 2022, he held several CFO positions at Randstad, both in the Netherlands and internationally. He holds the Dutch RA (chartered accountant) title and began his career at PwC in 1996. As CFO, Willem is in charge of the group’s financial activities. His portfolio comprises business operations, finance operations, accounting, treasury, control, quality, and legal affairs.
Finance Bart van Osch
Shared Service Center Florine Onderwijzer
Credit Management Theo Oud Ammerveld
CCO
Renger Lammers
About Renger Lammers
Renger Lammers joined HeadFirst Group as Chief Commercial Officer, focusing on strengthening the company’s commercial capabilities and driving its international growth strategy. With a background in operational excellence and commercial leadership, Renger has held senior roles at Aldi Einkauf, Essent, and Manpower Group Netherlands. He brings a strong customer-centric approach to his work, and his expertise will be key in expanding HeadFirst Group’s services both in the Netherlands and globally.
Commercial Office Marije Wildenborg
New Business, Direct Labels Matthijs Krabbendam
Existing Business, Direct Labels Jaschenka van Toledo
Indirect Commercial & International Rutger Treffers
COO
Arco Elsman
About Arco Elsman
Arco Elsman joined HeadFirst Group as Chief Operating Officer, bringing over 20 years of experience in outsourced HR services, including MSP and RPO. He has held leadership roles at companies such as Yacht, Twago, and Randstad RiseSmart. In his new role, Arco is focused on driving operational excellence. With a strong customer-centric approach and a proven track record in scaling HR tech businesses, Arco is leading HeadFirst Group’s innovation in its services.
MSP/RPO Kevin Segeren
Talent Sourcing Joey Verheule
MSP Light Marelle Beune
Center of Excellence Thomas Waldman
International David Muyldermans